First Timers:

When you want to pump out your boat for the first time, ASK FOR HELP. It is no more difficult than pumping gasoline, but facilities and machinery do vary. Generally the machines have instructions--if not, ask the manager to post them. In some marinas, dock staff will pump out the tank for you.

Portable Toilets:

Portable toilets are generally made of three compartments: the bowl, the fresh water tank, and the waste container. Emptying the waste container isn't hard.

Some marinas have a separate dumping station just for portable toilets. Others use their standard pumpout machinery with a different hose attachment for portables.

If you cannot find an onshore dumping station, you can take the waste container home and dispose of the waste down your toilet. Just remember to dilute it, particularly if your home is connected to a septic system. You can also ask the marina if you can use their onshore restrooms, but do not do so without permission.